As with any new idea or invention, there is a lot that can go wrong, whether it's a device glitch or a human glitch. It wouldn't surprise me if some nutjob attempted to make drugs that could "beat the straw." I still think the impetus behind the idea is sound, though, and is a step in the right direction.

I imagine it's difficult to get the measurements and reactions just right so that there are very few (hopefully no) false negatives and positives - but then even chemical contraception is not 100% effective. I can see this becoming a massive headache if it isn't tested enough. I also don't see people using this responsibly.

I could also see a ton of women not using this because they would be worried that it would offend their date.

I imagine it's difficult to get the measurements and reactions just right so that there are very few (hopefully no) false negatives and positives - but then even chemical contraception is not 100% effective. I can see this becoming a massive headache if it isn't tested enough. I also don't see people using this responsibly.

I could also see a ton of women not using this because they would be worried that it would offend their date.

I assume it'd rank somewhere between asking your date if s/he has a STD and asking if that spare tire around your date's stomach is for a truck or a van. In other words, Tuesday night for me.